If you are loading a G109b to more than 850kg, then...
- Either you're flying illegally, since last I looked 850kg is the MTOW, and I'm not sure I'd tell the CAA about it.
- It's a Vigilant T1 which has an MTOW of 908kg. The SLMG/TMG definition in JAR-22 only goes up to 850kg, so it must be a light aircraft. (Well I told the CAA that once and got away with it ).
I think the CAA have given up handing out "grandfather rights" ratings because it got them into too many arguments. So, if you were flying a civil G109b you were in their eyes, either flying with an instructor and a student logging P/UT, or a passenger.
G